科学研究   

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Wilson: Let me say about this morning, this—in my long career—this is the one morning when I think I took part in making history. That sounds like poor belief, but I am going to justify that in a mome...

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The structure of DNA that Watson and Crick discovered suggests how genetic information is passed on. Before a cell divides the double helix unwinds and the two strands of the DNA molecule in the nucle...

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Professor Bamforth—great to talk to you. Bamforth: It's nice to talk to you. Steve: What is beer? Bamforth: Beer is a fermented beverage based on malted cereals and spiced with hops and fermentatio...

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We know that DNA makes people and plants and puppies. So why not robots? Could it be possible to make tiny robots out of DNA? In 2006 Paul Rothemund found a way to make all sorts of tiny shapes ...

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Hi John—how are you? Rennie: Hi Steve—just fine. Steve: You were at this conference and you were on a panel discussing peer review. Rennie: That's right! Steve: Let's talk about what peer review i...

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During DNA replication, both strands of the double helix act as templates for the formation of new DNA molecules. Copying occurs at a localized region called the replication fork, which is a Y shaped ...

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Hi Dr. Heinrich. How are you today? Heinrich: Fine thank you, Steve. Steve: Tell me, first of all, all ravens are crows, but not all crows are ravens. Is that right? Heinrich: Yeah! I mean ravens a...

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Science and Technology. Eradicating polio, late? Or never? A plan to wipe out polio by the end of next year is in trouble. HUBRIS is always dangerous. In 1977 smallpox was eradicated and—an accident...

科技 根除脊髓灰质炎 为时已晚? 或绝无可能? 明年底消灭脊髓灰质炎的计划倍受挑战 骄傲自满通常是危险的行为。1977年，人类宣称消灭了天花(若将一年后英国实验室发生的一次偶然天花感染排除在外的话)，这份声明经历了时间的考验。 ...